package string;

public class StringBuilderDemo2 {
    public static void main(String[] args) {
        /*String str = "a";
        for(int i=0;i<1000000;i++){ //100万次
            str += "a";
        }
        System.out.println(str);
         */

        StringBuilder builder = new StringBuilder("a");
        for (int i=0;i<100000000;i++){
            builder.append("a");
        }
        System.out.println("执行完毕");
    }
}
